<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <form action="/login" method="post" enctype="application/x-www-form-urlencoded">
    用户名:<input type="text" name="username" />
    密码：<input type="password" name="password" />
    <input type="submit" value="登录" />
  </form>
</body>

</html>